Pneumatic hand-held screwdriver

摘要

The screwdriver has a screwing head to which a screw is fed automatically via a delivery line before each screwing process, a screwdriver piston which is moved by compressed air with a screwdriver motor and screwdriver to the screwing position in which the motor is rotated by compressed air, a torque sensor which switches the motor off when a certain torque is reached and a trigger which is held in the on position by the operator during screwing. A device outputs a motor signal whilst the screwdriver is running; a trigger display outputs a trigger signal whilst the trigger is in the on position. A controller indicates a fault if a detector detects that the motor signal is still present when the trigger signal ends.